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avfilter/af_afftfilt: stop resetting pts 

Also stop using audio fifo.
This commit is contained in:
Paul B Mahol 2022-02-22 22:26:12 +01:00
parent fee804f7ed
commit f984383ea0
1 changed files with 39 additions and 81 deletions
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120
libavfilter/af_afftfilt.c
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@ -18,7 +18,6 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/audio_fifo.h"
#include "libavutil/avstring.h"
#include "libavfilter/internal.h"
#include "libavutil/common.h"
@ -46,12 +45,10 @@ typedef struct AFFTFiltContext {
int window_size;
AVExpr **real;
AVExpr **imag;
AVAudioFifo *fifo;
int64_t pts;
int hop_size;
float overlap;
AVFrame *window;
AVFrame *buffer;
int eof;
int win_func;
float *window_func_lut;
} AFFTFiltContext;
@ -113,7 +110,6 @@ static int config_input(AVFilterLink *inlink)
int buf_size;
s->channels = inlink->channels;
s->pts = AV_NOPTS_VALUE;
ret = av_tx_init(&s->fft, &s->tx_fn, AV_TX_FLOAT_FFT, 0, s->fft_size, &scale, 0);
if (ret < 0)
return ret;
@ -196,15 +192,13 @@ static int config_input(AVFilterLink *inlink)
av_freep(&args);
s->fifo = av_audio_fifo_alloc(inlink->format, inlink->channels, s->window_size);
if (!s->fifo)
return AVERROR(ENOMEM);
s->window_func_lut = av_realloc_f(s->window_func_lut, s->window_size,
sizeof(*s->window_func_lut));
if (!s->window_func_lut)
return AVERROR(ENOMEM);
generate_window_func(s->window_func_lut, s->window_size, s->win_func, &overlap);
for (int i = 0; i < s->window_size; i++)
s->window_func_lut[i] = sqrtf(s->window_func_lut[i] / s->window_size);
if (s->overlap == 1)
s->overlap = overlap;
@ -212,6 +206,10 @@ static int config_input(AVFilterLink *inlink)
if (s->hop_size <= 0)
return AVERROR(EINVAL);
s->window = ff_get_audio_buffer(inlink, s->window_size * 2);
if (!s->window)
return AVERROR(ENOMEM);
s->buffer = ff_get_audio_buffer(inlink, s->window_size * 2);
if (!s->buffer)
return AVERROR(ENOMEM);
@ -222,43 +220,34 @@ fail:
return ret;
}
static int filter_frame(AVFilterLink *inlink)
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
AFFTFiltContext *s = ctx->priv;
const int window_size = s->window_size;
const float f = 1. / (s->window_size / 2);
const float *window_lut = s->window_func_lut;
const float f = sqrtf(1.f - s->overlap);
double values[VAR_VARS_NB];
AVFrame *out, *in = NULL;
int ch, n, ret, i;
if (!in) {
in = ff_get_audio_buffer(outlink, window_size);
if (!in)
return AVERROR(ENOMEM);
}
ret = av_audio_fifo_peek(s->fifo, (void **)in->extended_data, window_size);
if (ret < 0)
goto fail;
AVFrame *out;
for (ch = 0; ch < inlink->channels; ch++) {
const float *src = (float *)in->extended_data[ch];
const int offset = s->window_size - s->hop_size;
float *src = (float *)s->window->extended_data[ch];
AVComplexFloat *fft_in = s->fft_in[ch];
for (n = 0; n < in->nb_samples; n++) {
fft_in[n].re = src[n] * s->window_func_lut[n];
fft_in[n].im = 0;
}
memmove(src, &src[s->hop_size], offset * sizeof(float));
memcpy(&src[offset], in->extended_data[ch], in->nb_samples * sizeof(float));
memset(&src[offset + in->nb_samples], 0, (s->hop_size - in->nb_samples) * sizeof(float));
for (; n < window_size; n++) {
fft_in[n].re = 0;
for (n = 0; n < window_size; n++) {
fft_in[n].re = src[n] * window_lut[n];
fft_in[n].im = 0;
}
}
values[VAR_PTS] = s->pts;
values[VAR_PTS] = in->pts;
values[VAR_SAMPLE_RATE] = inlink->sample_rate;
values[VAR_NBBINS] = window_size / 2;
values[VAR_CHANNELS] = inlink->channels;
@ -278,7 +267,7 @@ static int filter_frame(AVFilterLink *inlink)
values[VAR_CHANNEL] = ch;
if (ctx->is_disabled) {
for (n = 0; n <= window_size / 2; n++) {
for (n = 0; n < window_size; n++) {
fft_temp[n].re = fft_out[n].re;
fft_temp[n].im = fft_out[n].im;
}
@ -296,17 +285,18 @@ static int filter_frame(AVFilterLink *inlink)
fft_temp[n].re = fr;
fft_temp[n].im = fi;
}
}
for (n = window_size / 2 + 1, x = window_size / 2 - 1; n < window_size; n++, x--) {
fft_temp[n].re = fft_temp[x].re;
fft_temp[n].im = -fft_temp[x].im;
for (n = window_size / 2 + 1, x = window_size / 2 - 1; n < window_size; n++, x--) {
fft_temp[n].re = fft_temp[x].re;
fft_temp[n].im = -fft_temp[x].im;
}
}
s->itx_fn(s->ifft, fft_out, fft_temp, sizeof(float));
memmove(buf, buf + s->hop_size, window_size * sizeof(float));
for (i = 0; i < window_size; i++) {
buf[i] += s->fft_out[ch][i].re * f;
buf[i] += fft_out[i].re * window_lut[i] * f;
}
}
@ -316,24 +306,20 @@ static int filter_frame(AVFilterLink *inlink)
goto fail;
}
out->pts = s->pts;
s->pts += av_rescale_q(s->hop_size, (AVRational){1, outlink->sample_rate}, outlink->time_base);
out->pts = in->pts;
out->nb_samples = in->nb_samples;
for (ch = 0; ch < inlink->channels; ch++) {
float *dst = (float *)out->extended_data[ch];
float *buf = (float *)s->buffer->extended_data[ch];
for (n = 0; n < s->hop_size; n++)
dst[n] = buf[n] * (1.f - s->overlap);
memmove(buf, buf + s->hop_size, window_size * 4);
memcpy(dst, buf, s->hop_size * sizeof(float));
}
ret = ff_filter_frame(outlink, out);
if (ret < 0)
goto fail;
av_audio_fifo_drain(s->fifo, s->hop_size);
fail:
av_frame_free(&in);
return ret < 0 ? ret : 0;
@ -350,48 +336,21 @@ static int activate(AVFilterContext *ctx)
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
if (!s->eof && av_audio_fifo_size(s->fifo) < s->window_size) {
ret = ff_inlink_consume_frame(inlink, &in);
if (ret < 0)
return ret;
if (ret > 0) {
ret = av_audio_fifo_write(s->fifo, (void **)in->extended_data,
in->nb_samples);
if (ret >= 0 && s->pts == AV_NOPTS_VALUE)
s->pts = in->pts;
av_frame_free(&in);
if (ret < 0)
return ret;
}
}
if ((av_audio_fifo_size(s->fifo) >= s->window_size) ||
(av_audio_fifo_size(s->fifo) > 0 && s->eof)) {
ret = filter_frame(inlink);
if (av_audio_fifo_size(s->fifo) >= s->window_size)
ff_filter_set_ready(ctx, 100);
ret = ff_inlink_consume_samples(inlink, s->hop_size, s->hop_size, &in);
if (ret < 0)
return ret;
}
if (!s->eof && ff_inlink_acknowledge_status(inlink, &status, &pts)) {
if (status == AVERROR_EOF) {
s->eof = 1;
if (av_audio_fifo_size(s->fifo) >= 0) {
ff_filter_set_ready(ctx, 100);
return 0;
}
}
}
if (ret > 0)
ret = filter_frame(inlink, in);
if (ret < 0)
return ret;
if (s->eof && av_audio_fifo_size(s->fifo) <= 0) {
ff_outlink_set_status(outlink, AVERROR_EOF, s->pts);
if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
ff_outlink_set_status(outlink, status, pts);
return 0;
}
if (!s->eof)
FF_FILTER_FORWARD_WANTED(outlink, inlink);
FF_FILTER_FORWARD_WANTED(outlink, inlink);
return FFERROR_NOT_READY;
}
@ -424,9 +383,8 @@ static av_cold void uninit(AVFilterContext *ctx)
av_freep(&s->real);
av_freep(&s->imag);
av_frame_free(&s->buffer);
av_frame_free(&s->window);
av_freep(&s->window_func_lut);
av_audio_fifo_free(s->fifo);
}
static const AVFilterPad inputs[] = {